Heck that bit looks... severe! Sorry, but that was my first impression. Was he broken in that bit? Idk about western, but I guess its the same as english, but I thought most people bridle broke horses with a simple snaffel bit. IMO a good horse will listen to the softest of bits and is only put in a stronger bit, or a bit with a different action, for training purposes- eg double bridle for more advanced dressage. The horse has to learn what is expected of him with a soft bit before being expected to do something in a different type of bit.
More complex bits comes after more advanced training when the bit is needed for more refined aids, the bit doesn't bring about the leap between happy hacker and advanced show horse, training does.
If you are set on getting a bit like that, you could try some similar bits before buying to see how the horse works in them. I would deffinately reccomend trying some none-twisted, slightly thicker mouthed bits first.
We lose ourselves in the things we love, we find ourselves there too ~Kristen Martz